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Updated: Feb 25, 2026
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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
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Combined fast selective reduction using Mn-based catalysts and nonthermal plasma for NOx removal
Jun Xiang Chen1, Kuan Lun Pan1, Sheng Jen Yu2
1Graduate Institute of Environmental Engineering, National Central University, No.300, Jhongda Road, Jhongli District, Taoyuan City, 32001, Taiwan.
Summary
This study combines nonthermal plasma (NTP) with Mn-based catalysts for efficient NO reduction. The NTP-SCR system achieves high NOx conversion at low temperatures, even with complex gas mixtures.
Area of Science:
- Environmental Chemistry
- Catalysis
- Plasma Science
Background:
- Selective Catalytic Reduction (SCR) is crucial for NOx emission control.
- Low-temperature SCR often faces challenges with catalyst activity and stability.
- Nonthermal plasma (NTP) offers a promising approach for low-temperature reactions.
Purpose of the Study:
- To investigate the synergistic effect of NTP and Mn-based catalysts for fast SCR of NOx.
- To evaluate the performance of Mn-Ce-Ni/TiO2 catalyst in NTP-SCR systems.
- To assess the stability and tolerance of the NTP-SCR system under various gas conditions.
Main Methods:
- Synthesis and characterization of Mn-based catalysts (Mn-Ce-Ni/TiO2, Mn-Ce/TiO2, Mn-Ce-Cu/TiO2).
- Experimental setup combining NTP (Dielectric Barrier Discharge - DBD) with SCR.
- Evaluation of NOx conversion and N2 selectivity at different temperatures and gas compositions.
Main Results:
- 10% wt. Mn-Ce-Ni/TiO2 exhibited superior NOx removal efficiency compared to other catalysts.
- 10% wt. Mn-Ce-Ni/TiO2 achieved 100% NOx conversion at 150°C.
- The two-stage NTP-SCR system demonstrated high NOx conversion (>95%) and N2 selectivity (80%) at 100°C, with excellent tolerance to H2O, SO2, C2H4, and CO.
Conclusions:
- Combining NTP with Mn-based catalysts is an effective strategy for low-temperature NOx reduction.
- The developed NTP-SCR system shows significant potential for industrial applications due to its high efficiency and tolerance to contaminants.
- Further research into catalyst optimization and reactor design can enhance performance for practical emission control.
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